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"medicine containing opium," early 15c., from Medieval Latin opiatus, from Latin opium (see opium). Figurative sense of "anything that dulls the feelings" is from 1640s. From 1540s in English as an adjective, "made with or containing opium."
opiate o·pi·ate (ō'pē-ĭt, -āt')
Any of various sedative narcotics that contain opium or one or more of its natural or synthetic derivatives.
A drug, hormone, or other chemical substance that has sedative or narcotic effects similar to those containing opium or its derivatives. Also called opioid.
Of or containing opium or any of its derivatives.
Resembling opium or its derivatives in activity.
Inducing sleep or sedation; soporific.